256507247244126 has 64 divisors (see below), whose sum is σ = 525334962087936. Its totient is φ = 83475041443200.

The previous prime is 256507247244109. The next prime is 256507247244137. The reversal of 256507247244126 is 621442742705652.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15303411 + ... + 27335121.

It is an arithmetic number, because the mean of its divisors is an integer number (8208358782624).

Almost surely, 2^{256507247244126} is an apocalyptic number.

256507247244126 is an abundant number, since it is smaller than the sum of its proper divisors (268827714843810).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

256507247244126 is a wasteful number, since it uses less digits than its factorization.

256507247244126 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12032257.

The product of its (nonzero) digits is 45158400, while the sum is 57.

Adding to 256507247244126 its reverse (621442742705652), we get a palindrome (877949989949778).

The spelling of 256507247244126 in words is "two hundred fifty-six trillion, five hundred seven billion, two hundred forty-seven million, two hundred forty-four thousand, one hundred twenty-six".